地铁车辆轮轨法向接触问题研究  

On Metro Vehicle Wheel/Rail Normal Contact

作　　者：孙树磊[1] 丁军君[1] 李芾[1] 黄运华[1] 周张义[1] 

机构地区：[1]西南交通大学机械工程学院,成都博士研究生610031

出　　处：《城市轨道交通研究》2013年第8期39-43,共5页Urban Mass Transit

基　　金：国家"八六三"高技术研究发展项目(2008AA030706);国家自然科学基金项目(50821063);中央高校基本科研业务费专项(SWJTU12CX041)

摘　　要：轮轨法向接触是影响轮轨磨耗和滚动接触疲劳的关键因素。分析了赫兹接触理论以及Kalker三维弹性体非赫兹滚动接触理论(精确理论),建立了地铁车辆轮轨接触有限元模型,计算不同轮对横移量下的轮轨接触斑形状和法向接触应力。计算结果表明:在踏面接触工况下,CONTACT的计算结果与有限元模型计算结果一致,而在轮缘接触工况下,CONTACT程序受弹性半空间假设限制导致计算结果与有限元模型计算结果相差较大;赫兹接触由于受接触斑内轮轨曲率为常数的限制,导致其计算结果与CONTACT和有限元模型计算结果相比有较大出入。Wheel/rail normal contact is a key factor in wheel wear and rolling contact fatigue. In this paper, Hertz contact theory and Kalker＇s 3D elastic non-Hertz contact theory（exact theory） are analyzed, the wheel/rail contact FE model of metro vehicle is built, and the contact patch and normal contact stress are calculated in different wheel-set shift. The results indicate that the contact patch and normal contact stress of the CON- TACT and FEM model is similar when the contact occurs on the wheel tread; but the result of the CONTACT is different to that of FEM model when the contact occurs on the wheel flange,because of the elastic half-space Hertz contact hypothe-sis in CONTACT ;and the result of Hertz contact is different to the CONTACT and FEM model because the curvature of wheel and rail in contact patch is constant according to Hertz contact theory.

关 键 词：地铁车辆 轮轨法向接触 赫兹接触 Kalker精确 理论 有限元 

分 类 号：U211.5[交通运输工程—道路与铁道工程]